From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.bugs Subject: bug#59213: Emacs 29: Edebug fails to instrument a parameter whose name begins with _ Date: Sat, 12 Nov 2022 09:35:58 +0000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21669"; mail-complaints-to="usenet@ciao.gmane.io" To: 59213@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 12 10:37:30 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1otmx8-0005V3-CP for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 12 Nov 2022 10:37:30 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1otmwk-0008IU-PE; Sat, 12 Nov 2022 04:37:06 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1otmwg-0008I6-GY for bug-gnu-emacs@gnu.org; Sat, 12 Nov 2022 04:37:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1otmwg-00061C-7t for bug-gnu-emacs@gnu.org; Sat, 12 Nov 2022 04:37:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1otmwf-0003lP-Pv for bug-gnu-emacs@gnu.org; Sat, 12 Nov 2022 04:37:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Alan Mackenzie Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 12 Nov 2022 09:37:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 59213 X-GNU-PR-Package: emacs X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.166824577714405 (code B ref -1); Sat, 12 Nov 2022 09:37:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 12 Nov 2022 09:36:17 +0000 Original-Received: from localhost ([127.0.0.1]:47336 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1otmvx-0003kH-5b for submit@debbugs.gnu.org; Sat, 12 Nov 2022 04:36:17 -0500 Original-Received: from lists.gnu.org ([209.51.188.17]:59520) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1otmvw-0003kA-8i for submit@debbugs.gnu.org; Sat, 12 Nov 2022 04:36:16 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1otmvv-0008FA-A2 for bug-gnu-emacs@gnu.org; Sat, 12 Nov 2022 04:36:16 -0500 Original-Received: from mx3.muc.de ([193.149.48.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1otmvt-0005xS-6n for bug-gnu-emacs@gnu.org; Sat, 12 Nov 2022 04:36:15 -0500 Original-Received: (qmail 85735 invoked by uid 3782); 12 Nov 2022 10:35:59 +0100 Original-Received: from acm.muc.de (p4fe15c31.dip0.t-ipconnect.de [79.225.92.49]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Sat, 12 Nov 2022 10:35:59 +0100 Original-Received: (qmail 3373 invoked by uid 1000); 12 Nov 2022 09:35:58 -0000 Content-Disposition: inline X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.5; envelope-from=acm@muc.de; helo=mx3.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:247643 Archived-At: Hello, Emacs. In Emacs 29 (not started with -Q, but...), I instrumented for edebug a function which looked like: (defun c-trim-found-types (beg end _old-len) ....) , the compilation being with lexical-binding: t. During the edebug session, I attempted e _old-len RET. Instead of giving me the value of _old-len (which was 3) it gave the error message Error: Symbol's value as variable is void: _old-len .. This is a bug. Just because a function doesn't use a particular argument (here _old-len) doesn't mean the person debugging it isn't interested in its value. In this particular case, it was extremely interesting, because beg and end were unequal, and _old-len was 3. In the end, I found out the info with the d command (backtrace), but I shouldn't have to. -- Alan Mackenzie (Nuremberg, Germany).